Improvement in coal-barges



. Coal-Barge. y No. 168,655.

- l Patented Oct. 11, 1875.

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NPEFERS. PNDYo-UTHOGRAPHER, v/ASMINGION. D C.

NITED STATES PATENT OFFICE.

GEORGE B. l MARTIN AND JULIUS A. PRESTON, OF NEW HAVEN, CONN. y

IMPRovEMl-:NT IN coAL-BARGES.

Specification forming part of Letters Patent No. [68.655, dated October11, 1875; application led May 19, 1875.

To all whom it may concern:

Be it known that we, GEORGE B. MARTIN and JULIUs A. PRESTON, of NewHaven, in the State of Connecticut, have invented an Improvement inBoats for Carrying Coal,

' tial lon gitudinal section.

The boat is of suitable dimensions, and made with bottom b, sides a a,deck c, combings e, and keelsons f, similar to those in aforesaidpatent, but the sides aware made of timbers extending lengthwise of theboat, and secured together with vertical bolts that connect the same tothe angle-stringers h; and, in order to prevent these timbers orplanking from moving upon each other in consequence of the weight in thevessel, I employ square dowels or coagin gs l 2, (see Figs. 2and 4,)that pass transversely between the timbers or plankings in square holesformed half in each timber; but, instead of employing a dowel that is-only large and long enough to ll the hole, I make the coagings taperingand longer than the thickness of` the timbers through which they pass.These coagings are driven into place, and till up the holes, and thesurplus length projects internally, so that after the vessel has been inuse, and the timbers hafe yielded to Lstrain or weight, the vessel willbe stilfened and rendered rigid by driving in these coagings, and sawingoff the ends that project upon the outside of the vessel.

The bottom of the vessel is made with reference to obtaining' greatstrength.V The crossbeams l are connected at their ends with the anglestring-pieces h, and beneath these beams l are the longitudinalstring-pieces m, upon the under side of which the planking b isreceived. The keelsons falso are in contact with the planking, and theyreceive the ends of the transverse floor strips or timbers o, upon whichthe longitudinal plankin g p is laid between the i keelsons.. Thisconstruction insures uniform distribution of the weight, and greatstrength. The uprights or posts rrest upon the keels'ons, and supportthe combings and deck, and tie-bolts s pass down through the combings atthe side of the post, and through the keelsons, so as to tie the partsfirmly together, and diagonal braces may be` used in addition. Theinclined partitions s run longitudinally of the boat, and extend fromthe keelsons, or near the same, `to the sides of the boat, and serve todirect the coal or other material ontained in bulk in the vessel towardthe central part below the opening or hatchway between the combings.

The vessel is divided into sections by transverse partitions orbulk-heads t, that are made to rest upon the beams l, and extend up tothe' under sides of the deck. They may also extend, as secondary orremovable partitions t', between the combings. The bulkhead planks't arereceived at their ends between the vertical angle-studs c, that areadapted to receive the dovetailed ends of the planks t, and the partsare bolted together.

Thereby the vessel is tied togetherby said' partitions or bulk-headsextending from one side vto the other, and rendered very stili', and thebulk-head is compressed and confined between the beams and combin gs bythe vertical tie-bolts, so that the longitudinal keelsons, combings, andtransverse bulk-heads are conlined into a very strong structure.,Inclines w, resting against the bulk-heads and upon the ooring, serveto direct the coal'toward the place from which it is excavated by anysuitable elevating apparatus. There are doorways through the bulk-headsbelow the i11- clined partitions, as at y, so that a man can pass alongthe side of the vessel and examine the same, eve'n when there is coal orother cargo in the boat.

Vile claim as our inventionl 1. The bulk-heads t, made with boards withdovetailed ends received between the vertical studs/v that are securedto the sides of the boat or barge, in combination with the bolts spassing through the combings and keelsons,

as set forth.

2. The boat or barge, made with dowelsl or coagings 2., that taper andproject within the Vessel, for the purposes set forth.

3. The longitudinal string-pieces m beneath the beams l, and receivingthe planking, in

combination with the floor-timbers o and plank- Aing p, as and for thepurposes set forth.

4:. The bulkheads, constructed as aforesaid, in combination with theinclined partitions s' and fw, as set forth.

5. The combination, in a barge, ofthe longitudinal keelsons f, thecombings e, the connecting-bolts s, and the transverse bulk-heads t,substantially as-and for the purposes set forth. Y

Signedv by us this 11th' dayof May, A. D.

GEORGE B. MARTIN. J ULIUS A. PRESTON. Witnesses:

J. C. COHLE, JNO. J. MARTIN.

